Home Applaince Hardware 1.2mm galvanized sheet spot welding sample 1.5+2mm stainless steel spot welding sample 1.5mm iron plate spot welding sample 4+4mm carbon steel plate spot welding sample Air conditioner external unit bottom plate hanger projection welding sample Microwave oven liner multi-point projection welding sample Microwave oven shell multi-point projection welding samples Microwave oven shell multi-spot welding samples Spot welding sample of reinforcement rib of air conditioner bottom plate Stainless steel explosion-proof cabinet M50 nut ring projection welding sample